Spin thermoelectric properties of a carbon nanotube quantum dot coupled to ferromagnetic leads

The influence of spin-dependent transport on the thermoelectric properties of a carbon nanotube quantum dot coupled to ferromagnetic leads is investigated using Green function formalism in the linear response regime. The interactions of electron-electron, electron-phonon, and spin-orbit are taken into account. Spin degeneracy is eliminated by applying a magnetic field on the system. The spin conductance and the spin Seebeck coefficient are increased by the increase of magnetic field and polarization of leads, resulting in enhancement of spin figure of merit.